Andrew Lizotte on Instagram: "These 3 jets didn’t just push limits. They rewrote the rules of flight! 1️⃣ Bell X-1 The first aircraft to break the sound barrier. In 1947, it proved Mach 1 was something you could fly through, not fear. 2️⃣ Lockheed A-12 A titanium spy plane built for Mach 3.2 and 90,000 feet. It was designed in an era when computers couldn’t even predict what that speed would do to metal. 3️⃣ North American X-15 A rocket-powered research jet that reached Mach 6.7 and touched the